From: Tianyue Ren Date: Fri, 9 Oct 2020 01:36:30 +0000 (+0800) Subject: selinux: fix error initialization in inode_doinit_with_dentry() X-Git-Tag: v4.19.164~241 X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=bd7223dda090c9246b290a0b901c112d6484466a;p=users%2Fdwmw2%2Flinux.git selinux: fix error initialization in inode_doinit_with_dentry() [ Upstream commit 83370b31a915493231e5b9addc72e4bef69f8d31 ] Mark the inode security label as invalid if we cannot find a dentry so that we will retry later rather than marking it initialized with the unlabeled SID. Fixes: 9287aed2ad1f ("selinux: Convert isec->lock into a spinlock") Signed-off-by: Tianyue Ren [PM: minor comment tweaks] Signed-off-by: Paul Moore Signed-off-by: Sasha Levin --- diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 250b725f5754c..02afe52a55d0d 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -1618,7 +1618,13 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent * inode_doinit with a dentry, before these inodes could * be used again by userspace. */ - goto out; + isec->initialized = LABEL_INVALID; + /* + * There is nothing useful to jump to the "out" + * label, except a needless spin lock/unlock + * cycle. + */ + return 0; } len = INITCONTEXTLEN; @@ -1733,8 +1739,15 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent * inode_doinit() with a dentry, before these inodes * could be used again by userspace. */ - if (!dentry) - goto out; + if (!dentry) { + isec->initialized = LABEL_INVALID; + /* + * There is nothing useful to jump to the "out" + * label, except a needless spin lock/unlock + * cycle. + */ + return 0; + } rc = selinux_genfs_get_sid(dentry, sclass, sbsec->flags, &sid); dput(dentry);